package biz.ezcom.servlet.filter.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * 编码过滤器 
 * @author Felix
 */
public class EncodingFilter implements Filter {

	private String encoding = "ISO8859-1";
	
	@Override
	public void init(FilterConfig config) throws ServletException {
		String systemEncoding = config.getInitParameter("encoding");
		if(systemEncoding != null) {
			encoding = systemEncoding;
		}
	}
	@Override
	public void destroy() {}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding(encoding);
		response.setCharacterEncoding(encoding);
		response.setContentType("text/html; charset=" + encoding);
		chain.doFilter(request, response);
	}

}
